Craftsman garage door opener won't close without keeping the control button down?

A few weeks ago it was doing the same thing, but the light would flash THREE times. I adjusted one ';eye'; a little bit and it worked again.





Now when I try to close it, the unit flashes TEN times. One eye is green and the other light is yellow. I don't remember if the second light was yellow before.Craftsman garage door opener won't close without keeping the control button down?
Ten flashes is actually the default signal that there is an issue with the photo eyes (which you had adjusted before). On these units one eye is always green, the other always yellow. If one of the photo eyes is knocked out of line or something is obstructing the path of the beam the green light will go out - the yellow light should stay lit at all times as it is a power/signal indicator. If both lights are lit and the opener still acts as though the beams are blocked it is usually one of two things:


(1) Look closely at the green light and make sure it is burning solid and not actually blinking really fast. Sometimes the eye can be barely out of line so that the light is flashing so quickly it looks solid from a distance.


(2) One of the photo eye wires has a short in it. Check the wire going to each photo eye to make sure it doesn't have any exposed areas that could cause a short. Also check where the wires are attached to the back of each photo eye - sometimes they can be hit and become loose so that the vibration of the door causes it to momentarily disconnect.





Hope this helps!